...and the damned Red Skull? Yet we don't disparage them as a hero comics culture. Nor the Mandarin, or Attuma, Loki, or Kang.
So there's no good reason at all for anyone to disparage the Ox, the Eel, the Owl, the Vanisher, the Flying Dutchman, Tiger Shark, the Faceless One, the Corruptor, Dr. Dorcas, the Piranhna, the Melter, Commander Kraken, Mesmero, or 98% of the others we no longer see. Not even Mr. Doll.
....or obscure mostly because I can't think of any other term for them and I'm used to it. But I agree with you.